US20030206589A1 - Method for coding moving picture - Google Patents

Method for coding moving picture Download PDF

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Publication number
US20030206589A1
US20030206589A1 US10/337,611 US33761103A US2003206589A1 US 20030206589 A1 US20030206589 A1 US 20030206589A1 US 33761103 A US33761103 A US 33761103A US 2003206589 A1 US2003206589 A1 US 2003206589A1
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picture
motion vector
specified
term reference
direct mode
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US10/337,611
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US8565305B2 (en
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Byeong Jeon
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LG Electronics Inc
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LG Electronics Inc
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Publication of US20030206589A1 publication Critical patent/US20030206589A1/en
Priority to US11/043,093 priority Critical patent/US8565306B2/en
Priority to US11/043,092 priority patent/US8630348B2/en
Priority to US11/043,182 priority patent/US8630349B2/en
Priority to US11/523,598 priority patent/US8638857B2/en
Priority to US11/889,259 priority patent/US8743960B2/en
Priority to US11/889,261 priority patent/US8582651B2/en
Priority to US11/889,260 priority patent/US8634468B2/en
Application granted granted Critical
Publication of US8565305B2 publication Critical patent/US8565305B2/en
Priority to US14/080,062 priority patent/US8848796B2/en
Priority to US14/080,066 priority patent/US8976866B2/en
Priority to US14/080,073 priority patent/US8982954B2/en
Priority to US14/080,203 priority patent/US9008183B2/en
Priority to US14/080,090 priority patent/US8982955B2/en
Priority to US14/107,374 priority patent/US8842737B2/en
Priority to US14/107,298 priority patent/US8811489B2/en
Priority to US14/107,318 priority patent/US8848797B2/en
Priority to US14/107,309 priority patent/US8837596B2/en
Priority to US14/107,256 priority patent/US8842736B2/en
Priority to US14/107,301 priority patent/US8798156B2/en
Priority to US14/531,192 priority patent/US9106889B2/en
Priority to US14/531,204 priority patent/US9106891B2/en
Priority to US14/531,208 priority patent/US9124890B2/en
Priority to US14/531,195 priority patent/US9106890B2/en
Priority to US14/813,776 priority patent/US9860556B2/en
Priority to US15/093,482 priority patent/US9872039B2/en
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Definitions

  • the present invention relates to a moving picture coding system, and more particularly, to a moving picture coding method to enhance a coding efficiency using a long-term reference picture.
  • the digital image coding method may be changed whenever a scene change is detected. For example, since similarity is very low between a picture in which scene change occurs and a picture in a previous scene, a picture with scene change is coded by intra mode in which a picture is coded using prediction only from decoded samples within the same picture rather than by inter mode in which a picture is coded by motion compensation from previously-decoded reference pictures.
  • a picture in which a scene change occurs in the entire picture is an intra picture that is coded in intra mode on all blocks. Meanwhile, in case of a picture in which a scene change occurs at some area, all blocks within the areas in which scene changes occur are coded in intra mode. Since such intra mode generates more bits compared with inter mode, a sequence in which scene changes occur very frequently has a fatal problem in a low bit rate application.
  • FIG. 1 illustrates a display order in which each picture is displayed when using two B pictures.
  • an intra picture I is displayed first among pictures to be displayed.
  • Two B pictures B 1 and B 2 are displayed subsequently after the intra picture I.
  • a P picture P 3 is displayed after the B pictures are displayed.
  • the next steps are performed.
  • the fourth and fifth B pictures B 4 and B 5 are displayed after the P picture P 3 is displayed.
  • a P picture P 6 is displayed.
  • the coding order of a digital image is not the same as the display order.
  • the P picture is coded prior to the B picture.
  • FIG. 2 illustrates a coding order in which each picture is displayed when using two B pictures.
  • the P picture P 3 is coded prior to the two B pictures B 1 and B 2 that are displayed prior to the P picture P 3 .
  • P 6 , B 4 , B 5 , P 9 , B 7 , B 8 , P 12 , B 10 and B 11 are coded subsequently.
  • the B pictures have five modes such as intra mode, forward mode, backward mode, bi-predictive mode and direct mode.
  • the bi-predictive mode has two reference pictures. Two reference pictures are all located prior to or after the B picture or one of them is located prior to the B picture and the other is located after the B picture.
  • the direct mode utilizes temporal redundancy to maintain motion continuity between two adjacent pictures.
  • the forward motion vector and the backward motion vector of the direct mode in the B picture are derived from the motion vector of a co-located block in the subsequent picture locating just after the B picture.
  • Such a direct mode does not need overhead bits such as motion information so that a bit rate can be reduced.
  • the forward motion vector MV f and the backward motion vector MV b of the conventional direct mode are obtained by scaling the motion vector MV using time distance between pictures when the co-located block in a subsequent picture has a motion vector MV.
  • MV is the motion vector of the co-located block in the subsequent picture
  • MV f is the forward motion vector of the direct mode for a B picture
  • MV b is the backward motion vector of the direct mode for the B picture
  • TRd is a time distance between the subsequent picture and a reference picture pointed by the motion vector of the co-located block in the subsequent picture
  • TRb is a time distance between a B picture and a reference picture pointed by the motion vector of the co-located block in the subsequent picture.
  • the direct mode is a coding mode to obtain two motion-compensated blocks using two motion vectors MV f and MV b and obtains a prediction block by averaging or interpolative calculation of two motion-compensated blocks.
  • the present invention is directed to a moving picture coding method that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • an object of the present invention is to provide a moving picture coding method capable of enhancing coding efficiency by direct mode using a long-term reference picture for a B picture.
  • Another object of the present invention is to provide a moving picture coding method capable of reducing the amount of bits using inter mode for the picture in which a scene change occurs.
  • a method of determining motion vectors of direct mode in a B picture includes the step of: when coding each block in the B picture using the direct mode, determining differently motion vectors of the direct mode for the B picture according to a kind of a reference buffer storing a reference picture pointed by a motion vector of a co-located block in a specified picture.
  • the specified picture is one of short-term reference pictures used in coding the B picture.
  • the kind of the reference picture is determined using a reference picture index calculated previously at a co-located block in the specified picture.
  • the reference picture index is stored in a system buffer.
  • a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture
  • a backward motion vector of the direct mode for the B picture is determined to be zero.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • motion vectors of the direct mode for the B picture are determined by scaling the motion vector of the co-located block in the specified picture by time distance between pictures.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • a method of determining motion vectors of direct mode in a B picture comprises the step of: when coding each block in the B picture using the direct mode, determining differently motion vectors of the direct mode for the B picture according to a kind of a reference buffer storing a specified picture.
  • the reference buffer includes a long-term reference buffer and a short-term reference buffer.
  • the specified picture is one of a short-term reference picture and a long-term reference picture.
  • a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
  • motion vectors of direct mode for the B picture are determined differently according to the kind of the reference buffer storing a reference picture pointed by the motion vector of the co-located block in the specified picture.
  • the kind of the reference picture is determined using a reference picture index calculated previously at the co-located block in the specified picture.
  • the reference picture index is stored in a system buffer.
  • a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture
  • a backward motion vector of the direct mode for the B picture is determined to be zero.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • motion vectors of the direct mode for the B picture are determined by scaling the motion vector of the co-located block in the specified picture by time distance between pictures.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • a method of coding a P picture of a moving picture in inter mode comprises the steps of: (a) determining whether a scene change occurs in the P picture; and (b) if a scene change occurs in the P picture, coding the P picture with reference to the long-term reference picture.
  • the P picture in which a scene change occurs is one of a scene cut picture and a partial scene change picture.
  • the blocks included in an area in which a scene change occurs are coded using a long-term reference picture.
  • a long-term reference buffer storing the long-term reference picture is a buffer to store a picture coded before a predetermined time.
  • the blocks included in an area in which a scene change does not occur are coded using a short-term reference picture.
  • a short-term reference buffer storing the short-term reference picture is a buffer to store a picture coded after a predetermined time.
  • a method of coding a moving picture sequence in a moving picture coding system comprises the steps of: (a) determining whether a scene change occurs in a P picture; (b) if there is a P picture in which a scene change occurs, coding the P picture in inter mode with reference to a long-term reference picture; (c) when coding each block in a B picture using direct mode according to coding order, determining a kind of a reference buffer storing a specified picture; and (d) calculating motion vectors of the direct mode for the B picture according to the kind of the reference buffer and coding the B picture in the direct mode.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
  • motion vectors of direct mode for the B picture are determined differently according to the kind of the reference buffer storing a reference picture pointed by the motion vector of the co-located block in the specified picture.
  • the kind of the reference picture is determined using a reference picture index calculated previously at a co-located block in the specified picture.
  • the reference picture index is stored in a system buffer.
  • a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture
  • a backward motion vector of the direct mode for the B picture is determined to be zero.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • motion vectors of the direct mode for the B picture are determined by scaling the motion vector calculated at the co-located block in the specified picture by time distance between pictures.
  • the motion vector calculated at the co-located block in the specified picture is stored in a system buffer.
  • the P picture in which a scene change occurs is one of a scene cut picture and a partial scene change picture.
  • the blocks included in an area in which a scene change occurs are coded using a long-term reference picture.
  • a long-term reference buffer storing the long-term reference picture is a buffer to store a picture coded before a predetermined time.
  • the blocks included in an area in which a scene change does not occur are coded using a short-term reference picture.
  • a short-term reference buffer storing the short-term reference picture is a buffer to store a picture coded after a predetermined time.
  • a short-term reference buffer consists of a first input first output (FIFO).
  • the specified picture for direct mode coding in the B picture is one of reference pictures used in coding the B picture.
  • FIG. 1 illustrates a display order in which each picture is displayed when using two B pictures
  • FIG. 2 illustrates a coding order in which each picture is displayed when using two B pictures
  • FIGS. 3A to 3 B flowcharts illustrating a method of coding a moving picture sequence in a moving picture coding system according to the preferred embodiment of the present invention
  • FIG. 4 illustrates a method of coding a moving picture sequence in which a scene change occurs according to the preferred embodiment of the present invention.
  • FIG. 5 illustrates a method of coding a B picture in direct mode according to the preferred embodiment of the present invention.
  • a picture in which a scene change occurs entirely in the picture is defined as a scene cut picture and a picture in which a scene change occurs partially in the picture is defined as a partial scene change picture.
  • FIGS. 3A and 3B are flowcharts illustrating a method of coding a moving picture sequence in a moving picture coding system according to the preferred embodiment of the present invention.
  • pictures are sequentially inputted from a moving picture sequence (S 111 ).
  • Kinds of pictures are determined (S 114 ). In other words, it is determined whether the inputted picture is a P picture or a B picture. Here, in this embodiment of the present invention, it is assumed that a coding with respect to an intra picture is completed in advance.
  • a picture is the P picture
  • it is determined whether or not a scene change occurs in the P picture (S 117 )
  • the scene change is determined by comparing the P picture with a picture (P picture or B picture) displayed just before the P picture.
  • the P picture is a scene cut picture. Meanwhile, if the P picture is determined as the scene cut picture, a coding is carried out with reference to a long-term reference picture (S 120 ).
  • the P picture is not the scene cut picture, it is determined whether or not the P picture is a partial scene change picture (S 123 ).
  • the P picture is the partial scene change picture
  • blocks contained in an area in which the scene is changed are coded with reference to the long-term reference picture returning to the step S 120 (S 126 ).
  • Blocks contained in an area in which the scene is not changed are coded with reference to a short-term reference picture (S 129 , S 132 ).
  • the long-term reference picture is a picture stored in a long-term reference buffer
  • the short-term reference picture is a picture stored in a short-term reference buffer.
  • the short-term reference buffer is provided with a first input first output (FIFO) in which a picture first inputted is outputted first, and the pictures coded before relatively short time are stored in the short-term reference buffer.
  • FIFO first input first output
  • the pictures coded before relatively long time are stored in the long-term reference buffer.
  • First pictures of respective scene sets i.e., an intra picture, the scene cut picture, the partial scene change picture and the like are stored in the long-term reference buffer.
  • the picture in which the scene change occurs can be stored additionally.
  • an intra picture I 0 that is first scene cut picture of a scene set A 1 , a first scene cut picture P 50 of a scene set B 1 and a first partial scene change picture P 120 can be stored in the long-term reference buffer.
  • scene set is a set of similar pictures. For example, suppose a discussion program that an announcer appears, a panel A appears, the announcer appears again and the panel A appears again. The scene that the announcer appears first is scene set A, and the scene that the panel A appears subsequently is scene set B. The scene that the announcer appears again is scene set A, and the scene that the panel A appears again is scene set B.
  • the P picture is coded by inter mode to code with reference to a short-term reference or a long-term reference picture instead intra mode. This reduces the amount of the bits to enhance coding efficiency.
  • the P picture is coded in inter mode with reference to the other reference pictures P 50 and P 120 belonging to a scene set B 1 that is same as a scene set B 2 .
  • the coding is performed differently depending on two conditions.
  • the blocks included in the area which a partial scene change occurs is coded in inter mode with reference to the long-term reference pictures P 50 and P 120 stored in the long-term reference buffer.
  • the blocks included in the area which a partial scene change does not occur is coded in inter mode with reference to the short-term reference pictures P 249 , P 248 , P 247 , etc stored in the short-term reference buffer.
  • the next picture is inputted (S 159 ). If the corresponding picture is a B picture, the five prediction modes (intra mode, forward mode, backward mode, bi-predictive mode and direct mode) are tested and one of them is selected as an optimal coding mode (S 135 , S 138 ). In this specification, direct mode will be described mainly.
  • one block of the B picture is read (S 141 ). Of course, the other blocks can be read subsequently. After then, a kind of a reference buffer storing a specified picture is examined
  • the specified picture is determined of the earlier pictures than the B picture in the coding order regardless of the display order.
  • the specified picture is one of the reference pictures used to code the B picture. Therefore, the specified picture cab be a short-term reference picture or a long-term reference picture.
  • the short-term reference pictures may be before or after the B picture in display order and they are stored in the short-term reference buffer.
  • the long-term reference pictures are stored in the long-term reference buffer. If the specified picture is a long-term reference picture, the forward motion vector of direct mode for the B picture is a motion vector of the co-located block in the specified picture.
  • the backward motion vector of direct mode for the B picture is determined to be zero (S 150 ).
  • the reference picture index and the motion vector calculated at the co-located block in the specified picture are read (S 144 ). These reference picture index and the motion vector is calculated previously and stored in the system buffer. According to reference picture index, it is determined whether the motion vector of the co-located block in the specified picture points to a long-term reference picture (S 147 ). As described above, the reference pictures are stored in the reference buffer which includes the short-term reference buffer and the long-term reference buffer.
  • the B picture is coded using the following expressions 3 and 4 (S 150 ).
  • MV is a motion vector of the co-located block in the specified picture
  • MVf is a forward motion vector of direct mode for the B picture
  • MV is a motion vector of the co-located block in the specified picture
  • MVb is a backward motion vector of direct mode for the B picture
  • the forward motion vector of direct mode for the B picture is the motion vector of the co-located block in the specified picture and the backward motion vector is zero.
  • TRd and TRb is meaningless in the conventional expressions 1 and 2.
  • TRd and TRb is the time distance including even the other scene set A 2 between the specified picture P 200 belonging to the scene set B 2 and the long-term reference picture P 50 belonging to the same scene set B 1 , the forward motion vector and the backward motion vector of direct mode cannot be calculated using such TRd and TRb.
  • the P picture P 200 that is earlier than the B 1 and B 2 pictures in coding order is coded at first.
  • the P picture P 200 is a scene cut picture in which a scene change occurs
  • the P picture P 200 is coded in inter mode from the long-term reference picture P 50 stored in the long-term reference buffer.
  • the next picture to be coded is a B 1 picture. Since the B 1 picture belongs to a scene set A 2 , the most blocks are coded in forward mode from the short-term reference pictures belonging to the scene set A 2 or in bi-predictive mode in which all of two reference pictures belong to the scene set A 2 .
  • intra mode, backward mode or bi-predictive mode from the P picture P 200 belonging to the other scene set B 2 , and direct mode to obtain motion vectors of the direct mode from the co-located block in the P picture P 200 are probably not used as the coding mode for the blocks in the B 1 picture.
  • the direct mode is selected as a coding mode for the most blocks in the B 2 picture.
  • the motion vectors of direct mode in the B 2 picture are calculated from the motion vector of the co-located block in the specified picture P 200 .
  • the direct mode can be selected as a coding mode for the most blocks in the B 2 picture. Accordingly, the coding efficiency for the B 2 picture is improved.
  • the B picture is coded using the conventional Expressions 1 and 2.
  • the forward motion vector and the backward motion vector of direct mode are determined using the conventional Expressions 1 and 2 related to TRd and TRb representing time distance.
  • next block in the B picture is read and coded subsequently (S 156 ). Such processes are performed on all blocks in the B picture. After the B picture is coded, the next picture is inputted and coded so that a moving picture coding is achieved (S 159 ).
  • the forward motion vector and the backward motion vector of direct mode for the B picture are determined differently based on the reference picture pointed by the motion vector of the co-located block in the specified picture.
  • direct mode is mainly used as coding mode to enhance the entire coding efficiency.
  • the P picture in which a scene change occurs is coded in inter mode using motion compensation from a long-term reference to reduce the amount of bits and enhance coding efficiency.

Abstract

The present invention relates to a moving picture coding method to enhance a coding efficiency for a moving picture coding sequence by inter mode and direct mode in a B picture using a long-term reference picture. In the present invention, a P picture is coded in inter mode according to scene change. The motion vectors of direct mode are calculated and coded according to the kind of the reference picture pointed by a motion vector of a co-located block in the specified picture.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • The present invention relates to a moving picture coding system, and more particularly, to a moving picture coding method to enhance a coding efficiency using a long-term reference picture. [0002]
  • 2. Description of the Related Art [0003]
  • It is desirable to detect a scene change in a sequence so as to compress and code a moving picture sequence optimally. This is because many video applications, such as in news, sports broadcasting, a close-up conversation like interview, and multi-point video conferencing, include repeating scene changes. Such a scene change can occur in an entire picture or in some area of the picture. [0004]
  • The digital image coding method may be changed whenever a scene change is detected. For example, since similarity is very low between a picture in which scene change occurs and a picture in a previous scene, a picture with scene change is coded by intra mode in which a picture is coded using prediction only from decoded samples within the same picture rather than by inter mode in which a picture is coded by motion compensation from previously-decoded reference pictures. [0005]
  • In more detail, a picture in which a scene change occurs in the entire picture, is an intra picture that is coded in intra mode on all blocks. Meanwhile, in case of a picture in which a scene change occurs at some area, all blocks within the areas in which scene changes occur are coded in intra mode. Since such intra mode generates more bits compared with inter mode, a sequence in which scene changes occur very frequently has a fatal problem in a low bit rate application. [0006]
  • Generally, when using a B picture in a moving picture coding system, the coding order is different from the displaying order. [0007]
  • FIG. 1 illustrates a display order in which each picture is displayed when using two B pictures. As shown in FIG. 1, an intra picture I is displayed first among pictures to be displayed. Two B pictures B[0008] 1 and B2 are displayed subsequently after the intra picture I. A P picture P3 is displayed after the B pictures are displayed. As described above, the next steps are performed. In other words, the fourth and fifth B pictures B4 and B5 are displayed after the P picture P3 is displayed. Subsequently, a P picture P6 is displayed.
  • However, the coding order of a digital image is not the same as the display order. In other words, the P picture is coded prior to the B picture. [0009]
  • FIG. 2 illustrates a coding order in which each picture is displayed when using two B pictures. As shown in FIG. 2, if an intra picture I is coded, the P picture P[0010] 3 is coded prior to the two B pictures B1 and B2 that are displayed prior to the P picture P3. After that, P6, B4, B5, P9, B7, B8, P12, B10 and B11 are coded subsequently.
  • Here, the B pictures have five modes such as intra mode, forward mode, backward mode, bi-predictive mode and direct mode. The bi-predictive mode has two reference pictures. Two reference pictures are all located prior to or after the B picture or one of them is located prior to the B picture and the other is located after the B picture. [0011]
  • Especially, the direct mode utilizes temporal redundancy to maintain motion continuity between two adjacent pictures. In other words, in the direct mode, the forward motion vector and the backward motion vector of the direct mode in the B picture are derived from the motion vector of a co-located block in the subsequent picture locating just after the B picture. Such a direct mode does not need overhead bits such as motion information so that a bit rate can be reduced. [0012]
  • Here, the forward motion vector MV[0013] f and the backward motion vector MVb of the conventional direct mode are obtained by scaling the motion vector MV using time distance between pictures when the co-located block in a subsequent picture has a motion vector MV. In other words, the forward motion vector MVf and the backward motion vector MVb are determined using the following Equations 1 and 2. Equation   1 :   MVf = TRb * MV TRd Equation   2 :   MVb = ( TRb - TRd ) * MV TRd
    Figure US20030206589A1-20031106-M00001
  • where MV is the motion vector of the co-located block in the subsequent picture, MV[0014] f is the forward motion vector of the direct mode for a B picture, MVb is the backward motion vector of the direct mode for the B picture, TRd is a time distance between the subsequent picture and a reference picture pointed by the motion vector of the co-located block in the subsequent picture, and TRb is a time distance between a B picture and a reference picture pointed by the motion vector of the co-located block in the subsequent picture.
  • AS a result, the direct mode is a coding mode to obtain two motion-compensated blocks using two motion vectors MV[0015] f and MVb and obtains a prediction block by averaging or interpolative calculation of two motion-compensated blocks.
    • SUMMARY OF THE INVENTION
  • The present invention is directed to a moving picture coding method that substantially obviates one or more problems due to limitations and disadvantages of the related art. [0016]
  • Accordingly, an object of the present invention is to provide a moving picture coding method capable of enhancing coding efficiency by direct mode using a long-term reference picture for a B picture. [0017]
  • Another object of the present invention is to provide a moving picture coding method capable of reducing the amount of bits using inter mode for the picture in which a scene change occurs. [0018]
  • Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. [0019]
  • To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a method of determining motion vectors of direct mode in a B picture includes the step of: when coding each block in the B picture using the direct mode, determining differently motion vectors of the direct mode for the B picture according to a kind of a reference buffer storing a reference picture pointed by a motion vector of a co-located block in a specified picture. [0020]
  • It is desired that the specified picture is one of short-term reference pictures used in coding the B picture. [0021]
  • The kind of the reference picture is determined using a reference picture index calculated previously at a co-located block in the specified picture. [0022]
  • The reference picture index is stored in a system buffer. [0023]
  • When a motion vector calculated at co-located block in the specified picture points to a long-term reference picture, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero. [0024]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0025]
  • When a motion vector calculated at co-located block in the specified picture points to a short-term reference picture, motion vectors of the direct mode for the B picture are determined by scaling the motion vector of the co-located block in the specified picture by time distance between pictures. [0026]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0027]
  • In another aspect of the present invention, a method of determining motion vectors of direct mode in a B picture comprises the step of: when coding each block in the B picture using the direct mode, determining differently motion vectors of the direct mode for the B picture according to a kind of a reference buffer storing a specified picture. [0028]
  • The reference buffer includes a long-term reference buffer and a short-term reference buffer. [0029]
  • It is desired that the specified picture is one of a short-term reference picture and a long-term reference picture. [0030]
  • When the specified picture is in the long-term reference buffer, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero. [0031]
  • When the specified picture is in the short-term reference buffer, motion vectors of direct mode for the B picture are determined differently according to the kind of the reference buffer storing a reference picture pointed by the motion vector of the co-located block in the specified picture. [0032]
  • The kind of the reference picture is determined using a reference picture index calculated previously at the co-located block in the specified picture. [0033]
  • The reference picture index is stored in a system buffer. [0034]
  • When a motion vector calculated at the co-located block in the specified picture points to a long-term reference picture, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero. [0035]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0036]
  • When a motion vector calculated at co-located block in the specified picture points to a short-term reference picture, motion vectors of the direct mode for the B picture are determined by scaling the motion vector of the co-located block in the specified picture by time distance between pictures. [0037]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0038]
  • In another aspect of the present invention, a method of coding a P picture of a moving picture in inter mode comprises the steps of: (a) determining whether a scene change occurs in the P picture; and (b) if a scene change occurs in the P picture, coding the P picture with reference to the long-term reference picture. [0039]
  • It is desired that the P picture in which a scene change occurs is one of a scene cut picture and a partial scene change picture. [0040]
  • If the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change occurs are coded using a long-term reference picture. [0041]
  • A long-term reference buffer storing the long-term reference picture is a buffer to store a picture coded before a predetermined time. [0042]
  • If the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change does not occur are coded using a short-term reference picture. [0043]
  • A short-term reference buffer storing the short-term reference picture is a buffer to store a picture coded after a predetermined time. [0044]
  • In another aspect of the present invention, a method of coding a moving picture sequence in a moving picture coding system comprises the steps of: (a) determining whether a scene change occurs in a P picture; (b) if there is a P picture in which a scene change occurs, coding the P picture in inter mode with reference to a long-term reference picture; (c) when coding each block in a B picture using direct mode according to coding order, determining a kind of a reference buffer storing a specified picture; and (d) calculating motion vectors of the direct mode for the B picture according to the kind of the reference buffer and coding the B picture in the direct mode. [0045]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0046]
  • When the specified picture is in the long-term reference buffer in the step (d), a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero. [0047]
  • When the specified picture is in the short-term reference buffer in the step (d), motion vectors of direct mode for the B picture are determined differently according to the kind of the reference buffer storing a reference picture pointed by the motion vector of the co-located block in the specified picture. [0048]
  • The kind of the reference picture is determined using a reference picture index calculated previously at a co-located block in the specified picture. [0049]
  • The reference picture index is stored in a system buffer. [0050]
  • When a motion vector calculated at co-located block in the specified picture points to a long-term reference picture, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero. [0051]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0052]
  • When a motion vector calculated at co-located block in the specified picture points to a short-term reference picture, motion vectors of the direct mode for the B picture are determined by scaling the motion vector calculated at the co-located block in the specified picture by time distance between pictures. [0053]
  • The motion vector calculated at the co-located block in the specified picture is stored in a system buffer. [0054]
  • The P picture in which a scene change occurs is one of a scene cut picture and a partial scene change picture. [0055]
  • If the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change occurs are coded using a long-term reference picture. [0056]
  • A long-term reference buffer storing the long-term reference picture is a buffer to store a picture coded before a predetermined time. [0057]
  • If the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change does not occur are coded using a short-term reference picture. [0058]
  • A short-term reference buffer storing the short-term reference picture is a buffer to store a picture coded after a predetermined time. [0059]
  • A short-term reference buffer consists of a first input first output (FIFO). [0060]
  • The specified picture for direct mode coding in the B picture is one of reference pictures used in coding the B picture. [0061]
  • It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. [0062]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings: [0063]
  • FIG. 1 illustrates a display order in which each picture is displayed when using two B pictures; [0064]
  • FIG. 2 illustrates a coding order in which each picture is displayed when using two B pictures; [0065]
  • FIGS. 3A to [0066] 3B flowcharts illustrating a method of coding a moving picture sequence in a moving picture coding system according to the preferred embodiment of the present invention;
  • FIG. 4 illustrates a method of coding a moving picture sequence in which a scene change occurs according to the preferred embodiment of the present invention; and [0067]
  • FIG. 5 illustrates a method of coding a B picture in direct mode according to the preferred embodiment of the present invention. [0068]
    • DETAILED DESCRIPTION OF THE INVENTION
  • Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. [0069]
  • To begin with, before an embodiment of the present invention is described, in moving pictures having a scene change, a picture in which a scene change occurs entirely in the picture is defined as a scene cut picture and a picture in which a scene change occurs partially in the picture is defined as a partial scene change picture. [0070]
  • FIGS. 3A and 3B are flowcharts illustrating a method of coding a moving picture sequence in a moving picture coding system according to the preferred embodiment of the present invention. Referring to FIGS. 3A and 3B, pictures are sequentially inputted from a moving picture sequence (S[0071] 111).
  • Kinds of pictures are determined (S[0072] 114). In other words, it is determined whether the inputted picture is a P picture or a B picture. Here, in this embodiment of the present invention, it is assumed that a coding with respect to an intra picture is completed in advance.
  • If a picture is the P picture, it is determined whether or not a scene change occurs in the P picture (S[0073] 117) Here, the scene change is determined by comparing the P picture with a picture (P picture or B picture) displayed just before the P picture.
  • As a result of the determination in the step S[0074] 117, if the scene is changed entirely among the P pictures, the P picture is a scene cut picture. Meanwhile, if the P picture is determined as the scene cut picture, a coding is carried out with reference to a long-term reference picture (S120).
  • If the P picture is not the scene cut picture, it is determined whether or not the P picture is a partial scene change picture (S[0075] 123).
  • If the P picture is the partial scene change picture, blocks contained in an area in which the scene is changed are coded with reference to the long-term reference picture returning to the step S[0076] 120 (S126).
  • Blocks contained in an area in which the scene is not changed are coded with reference to a short-term reference picture (S[0077] 129, S132).
  • Here, the long-term reference picture is a picture stored in a long-term reference buffer, and the short-term reference picture is a picture stored in a short-term reference buffer. [0078]
  • The short-term reference buffer is provided with a first input first output (FIFO) in which a picture first inputted is outputted first, and the pictures coded before relatively short time are stored in the short-term reference buffer. [0079]
  • The pictures coded before relatively long time are stored in the long-term reference buffer. First pictures of respective scene sets, i.e., an intra picture, the scene cut picture, the partial scene change picture and the like are stored in the long-term reference buffer. [0080]
  • If there is not the scene cut picture or the partial scene change picture in the long-term reference buffer, the picture in which the scene change occurs can be stored additionally. [0081]
  • Accordingly, as shown in FIG. 4, an intra picture I[0082] 0 that is first scene cut picture of a scene set A1, a first scene cut picture P50 of a scene set B1 and a first partial scene change picture P120 can be stored in the long-term reference buffer. Here, scene set is a set of similar pictures. For example, suppose a discussion program that an announcer appears, a panel A appears, the announcer appears again and the panel A appears again. The scene that the announcer appears first is scene set A, and the scene that the panel A appears subsequently is scene set B. The scene that the announcer appears again is scene set A, and the scene that the panel A appears again is scene set B. As described above, when a scene change occurs, the P picture is coded by inter mode to code with reference to a short-term reference or a long-term reference picture instead intra mode. This reduces the amount of the bits to enhance coding efficiency.
  • Description of the step S[0083] 117 to S132 will be made with FIG. 4. As shown in FIG. 4, if the P picture P200 to be coded now is the scene cut picture belonging to the scene set B2, the short-term reference pictures stored in the short-term reference buffer are not used. It is because the scene cut picture P200 is the first picture of the scene set B2, and the scene set of the scene cut picture P200 is different from the short-term reference pictures such as P199, P198, P197, etc belonging to the scene set A2. So the similarity of the scene cut picture P200 and the short-term reference pictures belonging to the scene set A2 is greatly reduced and the precise coding cannot be achieved from such reference pictures.
  • In this case, the P picture is coded in inter mode with reference to the other reference pictures P[0084] 50 and P120 belonging to a scene set B1 that is same as a scene set B2.
  • On the other hand, if the partial scene change occurs in the P picture P[0085] 250, the coding is performed differently depending on two conditions. In other words, the blocks included in the area which a partial scene change occurs is coded in inter mode with reference to the long-term reference pictures P50 and P120 stored in the long-term reference buffer. The blocks included in the area which a partial scene change does not occur is coded in inter mode with reference to the short-term reference pictures P249, P248, P247, etc stored in the short-term reference buffer.
  • As described above, after one P picture is coded, the next picture is inputted (S[0086] 159). If the corresponding picture is a B picture, the five prediction modes (intra mode, forward mode, backward mode, bi-predictive mode and direct mode) are tested and one of them is selected as an optimal coding mode (S135, S138). In this specification, direct mode will be described mainly.
  • First, one block of the B picture is read (S[0087] 141). Of course, the other blocks can be read subsequently. After then, a kind of a reference buffer storing a specified picture is examined
  • The specified picture is determined of the earlier pictures than the B picture in the coding order regardless of the display order. In other words, the specified picture is one of the reference pictures used to code the B picture. Therefore, the specified picture cab be a short-term reference picture or a long-term reference picture. The short-term reference pictures may be before or after the B picture in display order and they are stored in the short-term reference buffer. The long-term reference pictures are stored in the long-term reference buffer. If the specified picture is a long-term reference picture, the forward motion vector of direct mode for the B picture is a motion vector of the co-located block in the specified picture. The backward motion vector of direct mode for the B picture is determined to be zero (S[0088] 150). However, if the specified picture is a short-term reference picture, the reference picture index and the motion vector calculated at the co-located block in the specified picture are read (S144). These reference picture index and the motion vector is calculated previously and stored in the system buffer. According to reference picture index, it is determined whether the motion vector of the co-located block in the specified picture points to a long-term reference picture (S147). As described above, the reference pictures are stored in the reference buffer which includes the short-term reference buffer and the long-term reference buffer.
  • If the motion vector of the co-located block in the specified picture points to the long-term reference picture, the B picture is coded using the following expressions 3 and 4 (S[0089] 150).
  • Expression 3[0090]
  • MVf=MV
  • where MV is a motion vector of the co-located block in the specified picture, and MVf is a forward motion vector of direct mode for the B picture [0091]
  • Expression 4[0092]
  • MVb=0
  • where MV is a motion vector of the co-located block in the specified picture, and MVb is a backward motion vector of direct mode for the B picture [0093]
  • In other words, if the motion vector of the co-located block in the specified picture points to the long-term reference picture, the forward motion vector of direct mode for the B picture is the motion vector of the co-located block in the specified picture and the backward motion vector is zero. [0094]
  • As shown in FIG. 5, in the step S[0095] 150, if the motion vector of the co-located block in the specified picture P200 points to the long-term reference picture P50, TRd and TRb is meaningless in the conventional expressions 1 and 2. In other words, since TRd and TRb is the time distance including even the other scene set A2 between the specified picture P200 belonging to the scene set B2 and the long-term reference picture P50 belonging to the same scene set B1, the forward motion vector and the backward motion vector of direct mode cannot be calculated using such TRd and TRb.
  • Referring to FIG. 5, more detailed description is made. When inserting two B pictures into a moving picture sequence and coding them, the P picture P[0096] 200 that is earlier than the B1 and B2 pictures in coding order is coded at first. Here since the P picture P200 is a scene cut picture in which a scene change occurs, the P picture P200 is coded in inter mode from the long-term reference picture P50 stored in the long-term reference buffer. According to the coding order, the next picture to be coded is a B1 picture. Since the B1 picture belongs to a scene set A2, the most blocks are coded in forward mode from the short-term reference pictures belonging to the scene set A2 or in bi-predictive mode in which all of two reference pictures belong to the scene set A2. However, intra mode, backward mode or bi-predictive mode from the P picture P200 belonging to the other scene set B2, and direct mode to obtain motion vectors of the direct mode from the co-located block in the P picture P200 are probably not used as the coding mode for the blocks in the B1 picture.
  • Differently, since not only the B[0097] 2 picture but also the specified picture P200 used formotion vectors of direct mode for the B2 picture belong to the same scene set B2, the direct mode is selected as a coding mode for the most blocks in the B2 picture. In other words, after obtaining motion vector of each block in the specified picture P200 by inter mode from the long-term reference picture P50 belonging to the same scene set B2, the motion vectors of direct mode in the B2 picture are calculated from the motion vector of the co-located block in the specified picture P200. Since the B2 picture and the specified picture P200 belong to the scene set B2, the long-term reference picture P50 also belongs to the scene set B1, and the similarity between the scene set B1 and the scene set B2 is very high, the direct mode can be selected as a coding mode for the most blocks in the B2 picture. Accordingly, the coding efficiency for the B2 picture is improved.
  • On the other hand, if the motion vector of the co-located block in the specified picture points to a short-term reference picture, the B picture is coded using the [0098] conventional Expressions 1 and 2. In this time, since the short-term reference picture stored in the short-term reference buffer belongs to the same scene set as the B picture belongs to and other scene set does not exist between the specified picture and the short-term reference picture, the forward motion vector and the backward motion vector of direct mode are determined using the conventional Expressions 1 and 2 related to TRd and TRb representing time distance.
  • If one block of B picture is coded, the next block in the B picture is read and coded subsequently (S[0099] 156). Such processes are performed on all blocks in the B picture. After the B picture is coded, the next picture is inputted and coded so that a moving picture coding is achieved (S159).
  • As described above, according to a moving picture coding method of the present invention, the forward motion vector and the backward motion vector of direct mode for the B picture are determined differently based on the reference picture pointed by the motion vector of the co-located block in the specified picture. When coding the B picture, direct mode is mainly used as coding mode to enhance the entire coding efficiency. [0100]
  • According to the moving picture coding method of the present invention, the P picture in which a scene change occurs is coded in inter mode using motion compensation from a long-term reference to reduce the amount of bits and enhance coding efficiency. [0101]
  • It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. [0102]

Claims (42)

What is claimed is:
1. A method of determining motion vectors of direct mode in a B picture, the method comprising the step of:
when coding each block in the B picture using the direct mode, determining differently motion vectors of the direct mode for the B picture according to a kind of a reference buffer storing a reference picture pointed by a motion vector of a co-located block in a specified picture.
2. The method according to claim 1, wherein the specified picture is one of short-term reference pictures used in coding the B picture.
3. The method according to claim 1, wherein the kind of the reference picture is determined using a reference picture index calculated previously at the co-located block in the specified picture.
4. The method according to claim 3, wherein the reference picture index is stored in a system buffer.
5. The method according to claim 1, wherein when a motion vector calculated at the co-located block in the specified picture points to a long-term reference picture, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
6. The method according to claim 5, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
7. The method according to claim 1, wherein when a motion vector calculated at the co-located block in the specified picture points to a short-term reference picture, motion vectors of the direct mode for the B picture are determined by scaling the motion vector of the co-located block in the specified picture by time distance between pictures.
8. The method according to claim 7, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
9. A method of determining motion vectors of direct mode in a B picture, the method comprising the step of:
when coding each block in the B picture using the direct mode, determining differently motion vectors of the direct mode for the B picture according to a kind of a reference buffer storing a specified picture.
10. The method according to claim 9, wherein the reference buffer includes a long-term reference buffer and a short-term reference buffer.
11. The method according to claim 9, wherein the specified picture is one of a short-term reference picture and a long-term reference picture
12. The method according to claim 9, wherein when the specified picture is in the long-term reference buffer, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
13. The method according to claim 9, wherein when the specified picture is in the short-term reference buffer, motion vectors of direct mode for the B picture are determined differently according to the kind of the reference buffer storing a reference picture pointed by the motion vector of the co-located block in the specified picture.
14. The method according to claim 13, wherein the kind of the reference picture is determined using a reference picture index calculated previously at the co-located block in the specified picture.
15. The method according to claim 14, wherein the reference picture index is stored in a system buffer.
16. The method according to claim 13, wherein when a motion vector calculated at the co-located block in the specified picture points to a long-term reference picture, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
17. The method according to claim 16, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
18. The method according to claim 13, wherein when a motion vector calculated at co-located block in the specified picture points to a short-term reference picture, motion vectors of the direct mode for the B picture are determined by scaling the motion vector of the co-located block in the specified picture by time distance between pictures.
19. The method according to claim 18, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
20. A method of coding a P picture of a moving picture in inter mode, the method comprising the steps of:
(a) determining whether a scene change occurs in the P picture; and
(b) if a scene change occurs in the P picture, coding the P picture with reference to the long-term reference picture.
21. The method according to claim 20, wherein the P picture in which a scene change occurs is one of a scene cut picture and a partial scene change picture.
22. The method according to claim 20, wherein if the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change occurs are coded using a long-term reference picture.
23. The method according to claim 22, wherein a long-term reference buffer storing the long-term reference picture is a buffer to store a picture coded before a predetermined time.
24. The method according to claim 20, wherein if the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change does not occur are coded using a short-term reference picture.
25. The method according to claim 24, wherein a short-term reference buffer storing the short-term reference picture is a buffer to store a picture coded after a predetermined time.
26. A method of coding a moving picture sequence in a moving picture coding system, the method comprising the steps of:
(a) determining whether a scene change occurs in a P picture;
(b) if there is a P picture in which a scene change occurs, coding the P picture in inter mode with reference to a long-term reference picture;
(c) when coding each block in a B picture using direct mode according to coding order, determining a kind of a reference buffer storing a specified picture; and
(d) calculating motion vectors of the direct mode for the B picture according to the kind of the reference buffer and coding the B picture in the direct mode.
27. The method according to claim 26, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
28. The method according to claim 26, wherein when the specified picture is in the long-term reference buffer in the step (d), a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
29. The method according to claim 26, wherein when the specified picture is in the short-term reference buffer in the step (d), motion vectors of direct mode for the B picture are determined differently according to the kind of the reference buffer storing a reference picture pointed by the motion vector of the co-located block in the specified picture.
30. The method according to claim 29, wherein the kind of the reference picture is determined using a reference picture index calculated previously at a co-located block in the specified picture.
31. The method according to claim 30, wherein the reference picture index is stored in a system buffer.
32. The method according to claim 29, wherein when a motion vector calculated at co-located block in the specified picture points to a long-term reference picture, a forward motion vector of the direct mode for the B picture is a motion vector of the co-located block in the specified picture, and a backward motion vector of the direct mode for the B picture is determined to be zero.
33. The method according to claim 32, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
34. The method according to claim 29, wherein when a motion vector calculated at co-located block in the specified picture points to a short-term reference picture, motion vectors of the direct mode for the B picture are determined by scaling the motion vector calculated at the co-located block in the specified picture by time distance between pictures.
35. The method according to claim 34, wherein the motion vector of the co-located block in the specified picture is stored in a system buffer.
36. The method according to claim 26, wherein the P picture in which a scene change occurs is one of a scene cut picture and a partial scene change picture.
37. The method according to claim 26, wherein if the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change occurs are coded using a long-term reference picture.
38. The method according to claim 37, wherein a long-term reference buffer storing the long-term reference picture is a buffer to store a picture coded before a predetermined time.
39. The method according to claim 26, wherein if the P picture in which a scene change occurs is a partial scene change picture, the blocks included in an area in which a scene change does not occur are coded using a short-term reference picture.
40. The method according to claim 39, wherein a short-term reference buffer storing the short-term reference picture is a buffer to store a picture coded after a predetermined time.
41. The method according to claim 39, wherein a short-term reference buffer consists of a first input first output (FIFO).
42. The method according to claim 26, wherein the specified picture for direct mode coding in the B picture is one of reference pictures used in coding the B picture.
US10/337,611 2002-05-03 2003-01-06 Method of determining motion vectors for a bi-predictive block Active 2029-05-20 US8565305B2 (en)

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Application Number Priority Date Filing Date Title
US11/043,093 US8565306B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for an image block
US11/043,092 US8630348B2 (en) 2002-05-03 2005-01-27 Method of predicting an image block
US11/043,182 US8630349B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for a bi-predictive image block
US11/523,598 US8638857B2 (en) 2002-05-03 2006-09-20 Method of determining motion vectors for a bi-predictive image block
US11/889,260 US8634468B2 (en) 2002-05-03 2007-08-10 Method of decoding a current image block
US11/889,261 US8582651B2 (en) 2002-05-03 2007-08-10 Method of decoding a current image block
US11/889,259 US8743960B2 (en) 2002-05-03 2007-08-10 Method of decoding a bi-predictive image block
US14/080,062 US8848796B2 (en) 2002-05-03 2013-11-14 Method of determining motion vectors for bi-predictive image block
US14/080,066 US8976866B2 (en) 2002-05-03 2013-11-14 Method of determining motion vectors for bi-predictive image block
US14/080,073 US8982954B2 (en) 2002-05-03 2013-11-14 Method of determining motion vectors for bi-predictive image block
US14/080,203 US9008183B2 (en) 2002-05-03 2013-11-14 Method of determining motion vectors for bi-predictive image block
US14/080,090 US8982955B2 (en) 2002-05-03 2013-11-14 Method of determining motion vectors for bi-predictive image block
US14/107,318 US8848797B2 (en) 2002-05-03 2013-12-16 Method of determining motion vectors for a bi-predictive image block
US14/107,309 US8837596B2 (en) 2002-05-03 2013-12-16 Method of determining motion vectors for a bi-predictive image block
US14/107,374 US8842737B2 (en) 2002-05-03 2013-12-16 Method of determining motion vectors for a bi-predictive image block
US14/107,301 US8798156B2 (en) 2002-05-03 2013-12-16 Method of determining motion vectors for a bi-predictive image block
US14/107,298 US8811489B2 (en) 2002-05-03 2013-12-16 Method of determining motion vectors for a bi-predictive image block
US14/107,256 US8842736B2 (en) 2002-05-03 2013-12-16 Method of determining motion vectors for a bi-predictive image block
US14/531,195 US9106890B2 (en) 2002-05-03 2014-11-03 Method of determining motion vectors for bi-predictive image block
US14/531,208 US9124890B2 (en) 2002-05-03 2014-11-03 Method of determining motion vectors for bi-predictive image block
US14/531,192 US9106889B2 (en) 2002-05-03 2014-11-03 Method of determining motion vectors for bi-predictive image block
US14/531,204 US9106891B2 (en) 2002-05-03 2014-11-03 Method of determining motion vectors for bi-predictive image block
US14/813,776 US9860556B2 (en) 2002-05-03 2015-07-30 Method of determining motion vectors for bi-predictive image block
US15/093,482 US9872039B2 (en) 2002-05-03 2016-04-07 Method of determining motion vectors for bi-predictive image block

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US11/043,093 Division US8565306B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for an image block
US11/043,182 Division US8630349B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for a bi-predictive image block
US11/523,598 Division US8638857B2 (en) 2002-05-03 2006-09-20 Method of determining motion vectors for a bi-predictive image block
US11/889,261 Division US8582651B2 (en) 2002-05-03 2007-08-10 Method of decoding a current image block
US11/889,260 Division US8634468B2 (en) 2002-05-03 2007-08-10 Method of decoding a current image block
US11/889,259 Division US8743960B2 (en) 2002-05-03 2007-08-10 Method of decoding a bi-predictive image block
US11523598 Division 2009-09-20

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US11/043,182 Active 2026-08-11 US8630349B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for a bi-predictive image block
US11/043,093 Active 2028-12-21 US8565306B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for an image block
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US11/043,093 Active 2028-12-21 US8565306B2 (en) 2002-05-03 2005-01-27 Method of determining motion vectors for an image block
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US11/889,260 Active 2026-07-07 US8634468B2 (en) 2002-05-03 2007-08-10 Method of decoding a current image block
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Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040086047A1 (en) * 2002-01-09 2004-05-06 Satoshi Kondo Motion vector coding method and motion vector decoding method
US20050185713A1 (en) * 2004-02-24 2005-08-25 Lsi Logic Corporation Method and apparatus for determining a second picture for temporal direct-mode block prediction
US20060215759A1 (en) * 2005-03-23 2006-09-28 Kabushiki Kaisha Toshiba Moving picture encoding apparatus
US20080186320A1 (en) * 2007-02-06 2008-08-07 Infineon Technologies Ag Arrangement, method and computer program product for displaying a sequence of digital images
US20090067505A1 (en) * 2006-02-02 2009-03-12 Thomson Licensing Method and Apparatus for Motion Estimation Using Combined Reference Bi-Prediction
US20090168886A1 (en) * 2006-05-12 2009-07-02 Hiroshi Ikeda Moving picture decoding device
US7646810B2 (en) 2002-01-25 2010-01-12 Microsoft Corporation Video coding
US7664177B2 (en) * 2003-09-07 2010-02-16 Microsoft Corporation Intra-coded fields for bi-directional frames
US20100086062A1 (en) * 2007-01-23 2010-04-08 Euclid Discoveries, Llc Object archival systems and methods
US20100239000A1 (en) * 2009-03-20 2010-09-23 Cisco Technology, Inc. Camera Coupled Reference Frame
US20110182352A1 (en) * 2005-03-31 2011-07-28 Pace Charles P Feature-Based Video Compression
US8189666B2 (en) 2009-02-02 2012-05-29 Microsoft Corporation Local picture identifier and computation of co-located information
US8254455B2 (en) 2007-06-30 2012-08-28 Microsoft Corporation Computing collocated macroblock information for direct mode macroblocks
US8374245B2 (en) 2002-06-03 2013-02-12 Microsoft Corporation Spatiotemporal prediction for bidirectionally predictive(B) pictures and motion vector prediction for multi-picture reference motion compensation
US8379722B2 (en) 2002-07-19 2013-02-19 Microsoft Corporation Timestamp-independent motion vector prediction for predictive (P) and bidirectionally predictive (B) pictures
US20130107965A1 (en) * 2011-10-28 2013-05-02 Panasonic Corporation Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US20130107963A1 (en) * 2011-10-27 2013-05-02 Panasonic Corporation Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US20130251033A1 (en) * 2012-03-26 2013-09-26 Electronics And Telecommunications Research Institute Method of compressing video frame using dual object extraction and object trajectory information in video encoding and decoding process
JP2014030240A (en) * 2011-10-28 2014-02-13 Panasonic Corp Image decoding method and image decoding device
US8842154B2 (en) 2007-01-23 2014-09-23 Euclid Discoveries, Llc Systems and methods for providing personal video services
US8902971B2 (en) 2004-07-30 2014-12-02 Euclid Discoveries, Llc Video compression repository and model reuse
US8908766B2 (en) 2005-03-31 2014-12-09 Euclid Discoveries, Llc Computer method and apparatus for processing image data
US9165379B2 (en) 2010-09-02 2015-10-20 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US9332273B2 (en) 2011-11-08 2016-05-03 Samsung Electronics Co., Ltd. Method and apparatus for motion vector determination in video encoding or decoding
TWI562615B (en) * 2012-07-02 2016-12-11 Samsung Electronics Co Ltd Motion vector prediction method and apparatus for inter prediction
US9532069B2 (en) 2004-07-30 2016-12-27 Euclid Discoveries, Llc Video compression repository and model reuse
US9578345B2 (en) 2005-03-31 2017-02-21 Euclid Discoveries, Llc Model-based video encoding and decoding
US9621917B2 (en) 2014-03-10 2017-04-11 Euclid Discoveries, Llc Continuous block tracking for temporal prediction in video encoding
US9743078B2 (en) 2004-07-30 2017-08-22 Euclid Discoveries, Llc Standards-compliant model-based video encoding and decoding
US9936197B2 (en) 2011-10-28 2018-04-03 Samsung Electronics Co., Ltd. Method for inter prediction and device therefore, and method for motion compensation and device therefore
US20180139439A1 (en) * 2016-11-11 2018-05-17 Samsung Electronics Co., Ltd. Video processing device for encoding frames constituting hierarchical structure
US10091507B2 (en) 2014-03-10 2018-10-02 Euclid Discoveries, Llc Perceptual optimization for model-based video encoding
US10097851B2 (en) 2014-03-10 2018-10-09 Euclid Discoveries, Llc Perceptual optimization for model-based video encoding
CN110419217A (en) * 2018-04-02 2019-11-05 深圳市大疆创新科技有限公司 Method and image processing apparatus for image procossing
CN117041556A (en) * 2019-02-20 2023-11-10 北京达佳互联信息技术有限公司 Method, computing device, storage medium and program product for video encoding
US11949912B2 (en) 2018-04-02 2024-04-02 SZ DJI Technology Co., Ltd. Method and device for video image processing

Families Citing this family (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100491530B1 (en) 2002-05-03 2005-05-27 엘지전자 주식회사 Method of determining motion vector
KR100480028B1 (en) * 2002-05-07 2005-03-30 엘지전자 주식회사 Improved direct prediction mode for b pictures by addition of syntax element indicating scene change
KR100693669B1 (en) * 2003-03-03 2007-03-09 엘지전자 주식회사 Determination of a reference picture for processing a field macroblock
CN101010963B (en) * 2004-08-31 2012-07-04 汤姆森特许公司 Fast motion estimation for multiple reference pictures
WO2006028156A1 (en) * 2004-09-10 2006-03-16 Pioneer Corporation Image processing apparatus, image processing method and image processing program
US20070258009A1 (en) * 2004-09-30 2007-11-08 Pioneer Corporation Image Processing Device, Image Processing Method, and Image Processing Program
JP4541825B2 (en) * 2004-10-15 2010-09-08 キヤノン株式会社 Video encoding apparatus and control method thereof
JP4106070B2 (en) * 2004-11-26 2008-06-25 松下電器産業株式会社 Decoding circuit, decoding device, and decoding system
KR100668463B1 (en) * 2004-12-31 2007-01-12 엠큐브웍스(주) Method for Selecting Multiple Reference Frame in Moving Pictures Data Encoding
KR100728011B1 (en) 2005-11-09 2007-06-14 삼성전자주식회사 Apparatus for encoding and decoding image, and method theroff, and a recording medium storing program to implement the method
US20070199011A1 (en) * 2006-02-17 2007-08-23 Sony Corporation System and method for high quality AVC encoding
US8139877B2 (en) 2006-03-09 2012-03-20 Pioneer Corporation Image processing apparatus, image processing method, and computer-readable recording medium including shot generation
US7912129B2 (en) * 2006-03-16 2011-03-22 Sony Corporation Uni-modal based fast half-pel and fast quarter-pel refinement for video encoding
CN101491095B (en) * 2006-03-30 2013-07-10 Lg电子株式会社 A method and apparatus for decoding/encoding a video signal
JP4592656B2 (en) * 2006-08-17 2010-12-01 富士通セミコンダクター株式会社 Motion prediction processing device, image encoding device, and image decoding device
CN101523920B (en) * 2006-10-16 2013-12-04 汤姆森许可贸易公司 Method for using a network abstract layer unit to signal an instantaneous decoding refresh during a video operation
ES2439444T3 (en) 2006-10-30 2014-01-23 Nippon Telegraph And Telephone Corporation Coding method and video decoding method, devices for them, programs for them and storage media stored by the programs
US8200663B2 (en) * 2007-04-25 2012-06-12 Chacha Search, Inc. Method and system for improvement of relevance of search results
JP5188875B2 (en) * 2007-06-04 2013-04-24 株式会社エヌ・ティ・ティ・ドコモ Image predictive encoding device, image predictive decoding device, image predictive encoding method, image predictive decoding method, image predictive encoding program, and image predictive decoding program
US8526499B2 (en) * 2007-06-15 2013-09-03 Sungkyunkwan University Foundation For Corporate Collaboration Bi-prediction coding method and apparatus, bi-prediction decoding method and apparatus, and recording medium
WO2008153262A1 (en) * 2007-06-15 2008-12-18 Sungkyunkwan University Foundation For Corporate Collaboration Bi-prediction coding method and apparatus, bi-prediction decoding method and apparatus, and recording midium
US9386322B2 (en) 2007-07-02 2016-07-05 Nippon Telegraph And Telephone Corporation Scalable video encoding method and decoding method, apparatuses therefor, programs therefor, and storage media which store the programs
CN101119493B (en) * 2007-08-30 2010-12-01 威盛电子股份有限公司 Coding method and device for block type digital coding image
US20090100032A1 (en) * 2007-10-12 2009-04-16 Chacha Search, Inc. Method and system for creation of user/guide profile in a human-aided search system
KR100939917B1 (en) 2008-03-07 2010-02-03 에스케이 텔레콤주식회사 Encoding system using motion estimation and encoding method using motion estimation
JP4978575B2 (en) * 2008-06-25 2012-07-18 富士通株式会社 Image coding method and image coding program in thin client system
KR101149522B1 (en) * 2008-12-15 2012-05-25 한국전자통신연구원 Apparatus and method for detecting scene change
US9170816B2 (en) * 2009-01-15 2015-10-27 Altair Semiconductor Ltd. Enhancing processing efficiency in large instruction width processors
KR101668133B1 (en) 2009-03-06 2016-10-20 톰슨 라이센싱 Method for predicting a block of image data, decoding and coding devices implementing said method
CN101534442B (en) * 2009-04-13 2011-01-12 腾讯科技（深圳）有限公司 Video coding system and video coding method
BRPI0924908B1 (en) * 2009-06-18 2021-05-11 Kabushiki Kaisha Toshiba video encoding and decoding apparatus, methods for video encoding and decoding
KR101474756B1 (en) 2009-08-13 2014-12-19 삼성전자주식회사 Method and apparatus for encoding and decoding image using large transform unit
KR101522850B1 (en) * 2010-01-14 2015-05-26 삼성전자주식회사 Method and apparatus for encoding/decoding motion vector
JP5805991B2 (en) * 2010-05-07 2015-11-10 トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ Method for encoding picture sequence, corresponding reconstruction method, and stream of encoded data representing the sequence
US9014271B2 (en) * 2010-07-12 2015-04-21 Texas Instruments Incorporated Method and apparatus for region-based weighted prediction with improved global brightness detection
US20120163457A1 (en) * 2010-12-28 2012-06-28 Viktor Wahadaniah Moving picture decoding method, moving picture coding method, moving picture decoding apparatus, moving picture coding apparatus, and moving picture coding and decoding apparatus
US9083981B2 (en) 2011-01-12 2015-07-14 Panasonic Intellectual Property Corporation Of America Moving picture coding method and moving picture decoding method using a determination whether or not a reference block has two reference motion vectors that refer forward in display order with respect to a current picture
KR101484171B1 (en) * 2011-01-21 2015-01-23 에스케이 텔레콤주식회사 Motion Information Generating Apparatus and Method using Motion Vector Predictor Index Coding, and Image Encoding/Decoding Apparatus and Method using the Same
KR102401123B1 (en) 2011-02-09 2022-05-23 엘지전자 주식회사 Method for storing motion information and method for inducing temporal motion vector predictor using same
US10404998B2 (en) * 2011-02-22 2019-09-03 Sun Patent Trust Moving picture coding method, moving picture coding apparatus, moving picture decoding method, and moving picture decoding apparatus
KR101878008B1 (en) 2011-03-03 2018-07-13 선 페이턴트 트러스트 Video image encoding method, video image decoding method, video image encoding device, video image decoding device, and video image encoding/decoding device
JP5801908B2 (en) * 2011-03-11 2015-10-28 サムスン エレクトロニクス カンパニー リミテッド Video encoding method and apparatus, decoding method and apparatus thereof
CN107948657B (en) 2011-03-21 2021-05-04 Lg 电子株式会社 Method of selecting motion vector predictor and apparatus using the same
JP5954327B2 (en) 2011-06-30 2016-07-20 ソニー株式会社 Image processing apparatus and method, recording medium, and program
US9232233B2 (en) 2011-07-01 2016-01-05 Apple Inc. Adaptive configuration of reference frame buffer based on camera and background motion
CN102447902B (en) * 2011-09-30 2014-04-16 广州柯维新数码科技有限公司 Method for selecting reference field and acquiring time-domain motion vector
JP6034010B2 (en) * 2011-10-24 2016-11-30 ソニー株式会社 Encoding apparatus, encoding method, and program
US9648321B2 (en) 2011-12-02 2017-05-09 Qualcomm Incorporated Coding picture order count values identifying long-term reference frames
CN107566835B (en) * 2011-12-23 2020-02-28 韩国电子通信研究院 Image decoding method, image encoding method, and recording medium
US20130177084A1 (en) * 2012-01-10 2013-07-11 Qualcomm Incorporated Motion vector scaling in video coding
WO2013156678A1 (en) * 2012-04-16 2013-10-24 Nokia Corporation An apparatus, a method and a computer program for video coding and decoding
ES2754023T3 (en) 2012-04-16 2020-04-15 Samsung Electronics Co Ltd Procedure and apparatus for determining a set of reference images from an image
ES2832507T3 (en) * 2012-05-09 2021-06-10 Sun Patent Trust Procedure for performing motion vector prediction, encoding and decoding procedures and apparatus thereof
US9319679B2 (en) * 2012-06-07 2016-04-19 Qualcomm Incorporated Signaling data for long term reference pictures for video coding
US9420286B2 (en) 2012-06-15 2016-08-16 Qualcomm Incorporated Temporal motion vector prediction in HEVC and its extensions
US9014277B2 (en) * 2012-09-10 2015-04-21 Qualcomm Incorporated Adaptation of encoding and transmission parameters in pictures that follow scene changes
US9584825B2 (en) * 2012-09-27 2017-02-28 Qualcomm Incorporated Long-term reference picture signaling in video coding
US9392268B2 (en) 2012-09-28 2016-07-12 Qualcomm Incorporated Using base layer motion information
WO2014054325A1 (en) * 2012-10-05 2014-04-10 ソニー株式会社 Encoding control device and encoding control method
US9699466B2 (en) * 2013-12-26 2017-07-04 Mediatek Inc Adaptive reference/non-reference frame determination for video encoding
CN104768011B (en) * 2015-03-31 2018-03-06 浙江大学 Image coding/decoding method and relevant apparatus
CN104935938B (en) * 2015-07-15 2018-03-30 哈尔滨工业大学 Inter-frame prediction method in a kind of hybrid video coding standard
EP3651463A4 (en) 2017-09-12 2021-05-19 Samsung Electronics Co., Ltd. Method for encoding and decoding motion information and device for encoding and decoding motion information
WO2019194435A1 (en) * 2018-04-02 2019-10-10 엘지전자 주식회사 Method for coding image on basis of tmvp and apparatus therefor
WO2020073896A1 (en) * 2018-10-08 2020-04-16 Huawei Technologies Co., Ltd. Apparatuses and methods for inter prediction of a triangle partition of a coding block
EP3854093A4 (en) 2019-01-02 2021-10-27 Huawei Technologies Co., Ltd. A hardware and software friendly system and method for decoder-side motion vector refinement with decoder-side bi-predictive optical flow based per-pixel correction to bi-predictive motion compensation
KR20210132658A (en) * 2019-03-01 2021-11-04 베이징 바이트댄스 네트워크 테크놀로지 컴퍼니, 리미티드 Direction-based prediction for intra-block copying in video coding
US10638130B1 (en) * 2019-04-09 2020-04-28 Google Llc Entropy-inspired directional filtering for image coding
JP2019176500A (en) * 2019-06-05 2019-10-10 株式会社東芝 Encoding device, encoding program and streaming system
CN114175633B (en) 2019-07-10 2023-12-29 北京字节跳动网络技术有限公司 Sample identification for intra block copying in video codec
CN112203095B (en) * 2020-12-04 2021-03-09 腾讯科技（深圳）有限公司 Video motion estimation method, device, equipment and computer readable storage medium

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282049A (en) * 1991-02-08 1994-01-25 Olympus Optical Co., Ltd. Moving-picture data digital recording and reproducing apparatuses
US5305113A (en) * 1991-11-30 1994-04-19 Sony Corporation Motion picture decoding system which affords smooth reproduction of recorded motion picture coded data in forward and reverse directions at high speed
US5911008A (en) * 1996-04-30 1999-06-08 Nippon Telegraph And Telephone Corporation Scheme for detecting shot boundaries in compressed video data using inter-frame/inter-field prediction coding and intra-frame/intra-field coding
US5943445A (en) * 1996-12-19 1999-08-24 Digital Equipment Corporation Dynamic sprites for encoding video data
US6381275B1 (en) * 1996-06-28 2002-04-30 Mitsubishi Denki Kabushiki Kaisha Image coding apparatus and image decoding apparatus
US20020092030A1 (en) * 2000-05-10 2002-07-11 Qunshan Gu Video coding using multiple buffers
US6647061B1 (en) * 2000-06-09 2003-11-11 General Instrument Corporation Video size conversion and transcoding from MPEG-2 to MPEG-4
US20040057523A1 (en) * 2002-01-18 2004-03-25 Shinichiro Koto Video encoding method and apparatus and video decoding method and apparatus
US20040146109A1 (en) * 2002-04-19 2004-07-29 Satoshi Kondo Method for calculation motion vector
US7003035B2 (en) * 2002-01-25 2006-02-21 Microsoft Corporation Video coding methods and apparatuses

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0683443B2 (en) 1985-03-05 1994-10-19 富士通株式会社 Intra-frame interframe coding method
GB8903568D0 (en) * 1989-02-16 1989-04-05 British Telecomm Optical communications system
US5122875A (en) 1991-02-27 1992-06-16 General Electric Company An HDTV compression system
US5911088A (en) * 1991-05-30 1999-06-08 Canon Kabushiki Kaisha Camera
TW241350B (en) 1991-11-07 1995-02-21 Rca Thomson Licensing Corp
TW224553B (en) 1993-03-01 1994-06-01 Sony Co Ltd Method and apparatus for inverse discrete consine transform and coding/decoding of moving picture
KR970002967B1 (en) * 1993-04-09 1997-03-13 대우전자 주식회사 Motion vector detecting apparatus using block classification pattern
NZ269177A (en) * 1993-07-30 1996-09-25 British Telecomm Telescoping with video frame buffers in backward predictive coding
AU681185B2 (en) 1993-10-22 1997-08-21 Sony Corporation apparatus and method for recording and reproducing digital video data
EP0845908B1 (en) 1994-06-17 2003-02-05 Snell & Wilcox Limited Compressing a signal combined from compression encoded video signals after partial decoding thereof
JP3261023B2 (en) 1995-09-29 2002-02-25 京セラ株式会社 Dielectric porcelain composition
JP3347954B2 (en) * 1995-11-02 2002-11-20 三菱電機株式会社 Video encoding device and video decoding device
CN1183769C (en) 1996-05-28 2005-01-05 松下电器产业株式会社 image predictive coding/decoding device and method and recording medium
JP3617206B2 (en) * 1996-08-16 2005-02-02 セイコーエプソン株式会社 Display device, electronic apparatus, and driving method
EP2357829A1 (en) * 1997-02-13 2011-08-17 Mitsubishi Denki Kabushiki Kaisha Moving picture prediction system
JP3599942B2 (en) * 1997-02-13 2004-12-08 三洋電機株式会社 Moving picture coding method and moving picture coding apparatus
US5991447A (en) 1997-03-07 1999-11-23 General Instrument Corporation Prediction and coding of bi-directionally predicted video object planes for interlaced digital video
JP3290090B2 (en) 1997-03-10 2002-06-10 株式会社ケンウッド Image data compression encoding method and image data compression encoder
KR100234264B1 (en) * 1997-04-15 1999-12-15 윤종용 Block matching method using moving target window
JP2891253B1 (en) 1997-12-10 1999-05-17 日本電気株式会社 Image compression processor
JP4359966B2 (en) 1998-08-24 2009-11-11 ソニー株式会社 Image signal encoding apparatus, camera apparatus and recording method
KR20010071706A (en) * 1999-04-30 2001-07-31 요트.게.아. 롤페즈 Video encoding method with selection of B-frame encoding mode
JP2001086447A (en) 1999-09-17 2001-03-30 Sanyo Electric Co Ltd Image processor
WO2001033864A1 (en) * 1999-10-29 2001-05-10 Koninklijke Philips Electronics N.V. Video encoding-method
KR20020093873A (en) 2000-03-31 2002-12-16 클라리티 엘엘씨 Method and apparatus for voice signal extraction
JP2001309373A (en) 2000-04-21 2001-11-02 Pioneer Electronic Corp Device/method for detecting picture change, picture encoder and computer-readable information recording medium with program for detecting picture change recorded thereon
AU2000244979A1 (en) * 2000-04-28 2001-11-20 Telogy Networks, Inc. Real time fax-over-packet packet loss compensation
KR100364762B1 (en) 2000-06-22 2002-12-16 엘지전자 주식회사 Apparatus and Method for Progressive Scanning Image Converting, and Apparatus for Vertical Scanning Rate Converting Using the same
KR100491530B1 (en) * 2002-05-03 2005-05-27 엘지전자 주식회사 Method of determining motion vector

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282049A (en) * 1991-02-08 1994-01-25 Olympus Optical Co., Ltd. Moving-picture data digital recording and reproducing apparatuses
US5305113A (en) * 1991-11-30 1994-04-19 Sony Corporation Motion picture decoding system which affords smooth reproduction of recorded motion picture coded data in forward and reverse directions at high speed
US5911008A (en) * 1996-04-30 1999-06-08 Nippon Telegraph And Telephone Corporation Scheme for detecting shot boundaries in compressed video data using inter-frame/inter-field prediction coding and intra-frame/intra-field coding
US6381275B1 (en) * 1996-06-28 2002-04-30 Mitsubishi Denki Kabushiki Kaisha Image coding apparatus and image decoding apparatus
US5943445A (en) * 1996-12-19 1999-08-24 Digital Equipment Corporation Dynamic sprites for encoding video data
US20020092030A1 (en) * 2000-05-10 2002-07-11 Qunshan Gu Video coding using multiple buffers
US6647061B1 (en) * 2000-06-09 2003-11-11 General Instrument Corporation Video size conversion and transcoding from MPEG-2 to MPEG-4
US20040057523A1 (en) * 2002-01-18 2004-03-25 Shinichiro Koto Video encoding method and apparatus and video decoding method and apparatus
US7003035B2 (en) * 2002-01-25 2006-02-21 Microsoft Corporation Video coding methods and apparatuses
US20040146109A1 (en) * 2002-04-19 2004-07-29 Satoshi Kondo Method for calculation motion vector

Cited By (130)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE48035E1 (en) 2002-01-09 2020-06-02 Dolby International Ab Motion vector coding method and motion vector decoding method
US8290048B2 (en) 2002-01-09 2012-10-16 Panasonic Corporation Motion vector coding method and motion vector decoding method
US8290046B2 (en) 2002-01-09 2012-10-16 Panasonic Corporation Motion vector coding method and motion vector decoding method
AU2003201906B2 (en) * 2002-01-09 2007-09-13 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US7362807B2 (en) * 2002-01-09 2008-04-22 Matsushita Electric Industrial Co., Ltd. Motion vector coding method and motion vector decoding method
US9161050B2 (en) 2002-01-09 2015-10-13 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US9124896B2 (en) 2002-01-09 2015-09-01 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US9124897B2 (en) 2002-01-09 2015-09-01 Panasonic Intellectual Property Corporation Motion vector coding method and motion vector decoding method
US10362328B2 (en) 2002-01-09 2019-07-23 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US20100118969A1 (en) * 2002-01-09 2010-05-13 Satoshi Kondo Motion vector coding method and motion vector decoding method
US10313700B2 (en) 2002-01-09 2019-06-04 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US9451278B2 (en) 2002-01-09 2016-09-20 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US20040086047A1 (en) * 2002-01-09 2004-05-06 Satoshi Kondo Motion vector coding method and motion vector decoding method
US8908769B2 (en) 2002-01-09 2014-12-09 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US8885717B2 (en) 2002-01-09 2014-11-11 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US8902987B2 (en) 2002-01-09 2014-12-02 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US9407927B2 (en) 2002-01-09 2016-08-02 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US8401080B2 (en) 2002-01-09 2013-03-19 Panasonic Corporation Motion vector coding method and motion vector decoding method
US8885718B2 (en) 2002-01-09 2014-11-11 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
USRE46924E1 (en) 2002-01-09 2018-06-26 Dolby International Ab Motion vector coding method and motion vector decoding method
US8885719B2 (en) 2002-01-09 2014-11-11 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US8290047B2 (en) 2002-01-09 2012-10-16 Panasonic Corporation Motion vector coding method and motion vector decoding method
US8885720B2 (en) 2002-01-09 2014-11-11 Panasonic Intellectual Property Corporation Of America Motion vector coding method and motion vector decoding method
US9888237B2 (en) 2002-01-25 2018-02-06 Microsoft Technology Licensing, Llc Video coding
US8638853B2 (en) 2002-01-25 2014-01-28 Microsoft Corporation Video coding
US10284843B2 (en) 2002-01-25 2019-05-07 Microsoft Technology Licensing, Llc Video coding
US8406300B2 (en) 2002-01-25 2013-03-26 Microsoft Corporation Video coding
US7646810B2 (en) 2002-01-25 2010-01-12 Microsoft Corporation Video coding
US8374245B2 (en) 2002-06-03 2013-02-12 Microsoft Corporation Spatiotemporal prediction for bidirectionally predictive(B) pictures and motion vector prediction for multi-picture reference motion compensation
US9185427B2 (en) 2002-06-03 2015-11-10 Microsoft Technology Licensing, Llc Spatiotemporal prediction for bidirectionally predictive (B) pictures and motion vector prediction for multi-picture reference motion compensation
US9571854B2 (en) 2002-06-03 2017-02-14 Microsoft Technology Licensing, Llc Spatiotemporal prediction for bidirectionally predictive (B) pictures and motion vector prediction for multi-picture reference motion compensation
US8873630B2 (en) 2002-06-03 2014-10-28 Microsoft Corporation Spatiotemporal prediction for bidirectionally predictive (B) pictures and motion vector prediction for multi-picture reference motion compensation
US10116959B2 (en) 2002-06-03 2018-10-30 Microsoft Technology Licesning, LLC Spatiotemporal prediction for bidirectionally predictive (B) pictures and motion vector prediction for multi-picture reference motion compensation
US8379722B2 (en) 2002-07-19 2013-02-19 Microsoft Corporation Timestamp-independent motion vector prediction for predictive (P) and bidirectionally predictive (B) pictures
US8774280B2 (en) 2002-07-19 2014-07-08 Microsoft Corporation Timestamp-independent motion vector prediction for predictive (P) and bidirectionally predictive (B) pictures
US8064520B2 (en) 2003-09-07 2011-11-22 Microsoft Corporation Advanced bi-directional predictive coding of interlaced video
US7664177B2 (en) * 2003-09-07 2010-02-16 Microsoft Corporation Intra-coded fields for bi-directional frames
US7680185B2 (en) 2003-09-07 2010-03-16 Microsoft Corporation Self-referencing bi-directionally predicted frames
US7852936B2 (en) 2003-09-07 2010-12-14 Microsoft Corporation Motion vector prediction in bi-directionally predicted interlaced field-coded pictures
US8036271B2 (en) * 2004-02-24 2011-10-11 Lsi Corporation Method and apparatus for determining a second picture for temporal direct-mode block prediction
US20050185713A1 (en) * 2004-02-24 2005-08-25 Lsi Logic Corporation Method and apparatus for determining a second picture for temporal direct-mode block prediction
US9743078B2 (en) 2004-07-30 2017-08-22 Euclid Discoveries, Llc Standards-compliant model-based video encoding and decoding
US8902971B2 (en) 2004-07-30 2014-12-02 Euclid Discoveries, Llc Video compression repository and model reuse
US9532069B2 (en) 2004-07-30 2016-12-27 Euclid Discoveries, Llc Video compression repository and model reuse
US20060215759A1 (en) * 2005-03-23 2006-09-28 Kabushiki Kaisha Toshiba Moving picture encoding apparatus
US8942283B2 (en) 2005-03-31 2015-01-27 Euclid Discoveries, Llc Feature-based hybrid video codec comparing compression efficiency of encodings
US8964835B2 (en) 2005-03-31 2015-02-24 Euclid Discoveries, Llc Feature-based video compression
US9578345B2 (en) 2005-03-31 2017-02-21 Euclid Discoveries, Llc Model-based video encoding and decoding
US20110182352A1 (en) * 2005-03-31 2011-07-28 Pace Charles P Feature-Based Video Compression
US8908766B2 (en) 2005-03-31 2014-12-09 Euclid Discoveries, Llc Computer method and apparatus for processing image data
US20090067505A1 (en) * 2006-02-02 2009-03-12 Thomson Licensing Method and Apparatus for Motion Estimation Using Combined Reference Bi-Prediction
US9215475B2 (en) * 2006-02-02 2015-12-15 Thomson Licensing Method and apparatus for motion estimation using combined reference bi-prediction
US20090168886A1 (en) * 2006-05-12 2009-07-02 Hiroshi Ikeda Moving picture decoding device
US8270492B2 (en) 2006-05-12 2012-09-18 Panasonic Corporation Moving picture decoding device
US9106977B2 (en) 2006-06-08 2015-08-11 Euclid Discoveries, Llc Object archival systems and methods
US8842154B2 (en) 2007-01-23 2014-09-23 Euclid Discoveries, Llc Systems and methods for providing personal video services
US8553782B2 (en) * 2007-01-23 2013-10-08 Euclid Discoveries, Llc Object archival systems and methods
US20100086062A1 (en) * 2007-01-23 2010-04-08 Euclid Discoveries, Llc Object archival systems and methods
US20080186320A1 (en) * 2007-02-06 2008-08-07 Infineon Technologies Ag Arrangement, method and computer program product for displaying a sequence of digital images
US8254455B2 (en) 2007-06-30 2012-08-28 Microsoft Corporation Computing collocated macroblock information for direct mode macroblocks
US8189666B2 (en) 2009-02-02 2012-05-29 Microsoft Corporation Local picture identifier and computation of co-located information
US8340180B2 (en) * 2009-03-20 2012-12-25 Cisco Technology, Inc. Camera coupled reference frame
US20100239000A1 (en) * 2009-03-20 2010-09-23 Cisco Technology, Inc. Camera Coupled Reference Frame
US9560374B2 (en) 2010-09-02 2017-01-31 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US11653021B2 (en) 2010-09-02 2023-05-16 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US20170105021A1 (en) * 2010-09-02 2017-04-13 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US9165379B2 (en) 2010-09-02 2015-10-20 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US11245918B2 (en) 2010-09-02 2022-02-08 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US10097854B2 (en) * 2010-09-02 2018-10-09 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US10666969B2 (en) 2010-09-02 2020-05-26 Lg Electronics Inc. Method for encoding and decoding video, and apparatus using same
US20130301728A1 (en) * 2011-10-27 2013-11-14 Panasonic Corporation Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US8929454B2 (en) * 2011-10-27 2015-01-06 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US20130107963A1 (en) * 2011-10-27 2013-05-02 Panasonic Corporation Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
AU2012329550B2 (en) * 2011-10-27 2016-09-08 Sun Patent Trust Image encoding method, image decoding method, image encoding apparatus, and image decoding apparatus
US20140010287A1 (en) * 2011-10-27 2014-01-09 Panasonic Corporation Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US8855208B2 (en) * 2011-10-27 2014-10-07 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US8873635B2 (en) * 2011-10-27 2014-10-28 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US20140341298A1 (en) * 2011-10-27 2014-11-20 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
TWI556631B (en) * 2011-10-27 2016-11-01 Sun Patent Trust An image coding method, an image decoding method, an image coding apparatus, and an image decoding apparatus
US8897366B2 (en) * 2011-10-27 2014-11-25 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US20140348244A1 (en) * 2011-10-27 2014-11-27 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US9172971B2 (en) 2011-10-27 2015-10-27 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US8923404B2 (en) * 2011-10-27 2014-12-30 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US10045047B2 (en) 2011-10-28 2018-08-07 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
CN104041042A (en) * 2011-10-28 2014-09-10 松下电器产业株式会社 Image encoding method, image decoding method, image encoding device, and image decoding device
RU2609083C2 (en) * 2011-10-28 2017-01-30 Сан Пэтент Траст Image encoding method, image decoding method, image encoding device and image decoding device
US11902568B2 (en) 2011-10-28 2024-02-13 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US8913665B2 (en) 2011-10-28 2014-12-16 Panasonic Intellectual Property Corporation Of America Method and apparatus for coding with long and short-term reference pictures
US11831907B2 (en) 2011-10-28 2023-11-28 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US9699474B2 (en) 2011-10-28 2017-07-04 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
TWI563831B (en) * 2011-10-28 2016-12-21 Sun Patent Trust
US20130107965A1 (en) * 2011-10-28 2013-05-02 Panasonic Corporation Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
RU2646328C1 (en) * 2011-10-28 2018-03-02 Сан Пэтент Траст Image encoding method, image decoding method, image encoding device and image decoding device
US9912962B2 (en) 2011-10-28 2018-03-06 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US9936197B2 (en) 2011-10-28 2018-04-03 Samsung Electronics Co., Ltd. Method for inter prediction and device therefore, and method for motion compensation and device therefore
CN107948656A (en) * 2011-10-28 2018-04-20 太阳专利托管公司 Picture decoding method and picture decoding apparatus
US11622128B2 (en) 2011-10-28 2023-04-04 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US11356696B2 (en) 2011-10-28 2022-06-07 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US9357227B2 (en) 2011-10-28 2016-05-31 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US11206414B2 (en) 2011-10-28 2021-12-21 Samsung Electronics Co., Ltd. Method for inter prediction and device therefor, and method for motion compensation and device therefor
TWI552576B (en) * 2011-10-28 2016-10-01 Sun Patent Trust Image coding method, image decoding method, image coding device, and image decoding device
US11115677B2 (en) 2011-10-28 2021-09-07 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US8861606B2 (en) * 2011-10-28 2014-10-14 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US10893293B2 (en) 2011-10-28 2021-01-12 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US10819989B2 (en) 2011-10-28 2020-10-27 Samsung Electronics Co., Ltd. Method for inter prediction and device therefor, and method for motion compensation and device therefor
US9191679B2 (en) 2011-10-28 2015-11-17 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US9088799B2 (en) 2011-10-28 2015-07-21 Panasonic Intellectual Property Corporation Of America Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US10321152B2 (en) 2011-10-28 2019-06-11 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
JP2014030240A (en) * 2011-10-28 2014-02-13 Panasonic Corp Image decoding method and image decoding device
US10631004B2 (en) 2011-10-28 2020-04-21 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US10567792B2 (en) 2011-10-28 2020-02-18 Sun Patent Trust Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
US10575002B2 (en) 2011-10-28 2020-02-25 Samsung Electronics Co., Ltd. Method for inter prediction and device therefor, and method for motion compensation and device therefor
US9332273B2 (en) 2011-11-08 2016-05-03 Samsung Electronics Co., Ltd. Method and apparatus for motion vector determination in video encoding or decoding
US9451282B2 (en) 2011-11-08 2016-09-20 Samsung Electronics Co., Ltd. Method and apparatus for motion vector determination in video encoding or decoding
TWI556648B (en) * 2011-11-08 2016-11-01 三星電子股份有限公司 Method for decoding image
US20130251033A1 (en) * 2012-03-26 2013-09-26 Electronics And Telecommunications Research Institute Method of compressing video frame using dual object extraction and object trajectory information in video encoding and decoding process
US10200710B2 (en) 2012-07-02 2019-02-05 Samsung Electronics Co., Ltd. Motion vector prediction method and apparatus for encoding or decoding video
RU2624578C2 (en) * 2012-07-02 2017-07-04 Самсунг Электроникс Ко., Лтд. Method and device for motion vector prediction for video encoding or decoding
RU2673846C1 (en) * 2012-07-02 2018-11-30 Самсунг Электроникс Ко., Лтд. Method and device for predicting motion vector for video encoding or video decoding
TWI562615B (en) * 2012-07-02 2016-12-11 Samsung Electronics Co Ltd Motion vector prediction method and apparatus for inter prediction
US10097851B2 (en) 2014-03-10 2018-10-09 Euclid Discoveries, Llc Perceptual optimization for model-based video encoding
US10091507B2 (en) 2014-03-10 2018-10-02 Euclid Discoveries, Llc Perceptual optimization for model-based video encoding
US9621917B2 (en) 2014-03-10 2017-04-11 Euclid Discoveries, Llc Continuous block tracking for temporal prediction in video encoding
US10694178B2 (en) * 2016-11-11 2020-06-23 Samsung Electronics Co., Ltd. Video processing device for encoding frames constituting hierarchical structure
US20180139439A1 (en) * 2016-11-11 2018-05-17 Samsung Electronics Co., Ltd. Video processing device for encoding frames constituting hierarchical structure
CN110419217A (en) * 2018-04-02 2019-11-05 深圳市大疆创新科技有限公司 Method and image processing apparatus for image procossing
US11871032B2 (en) 2018-04-02 2024-01-09 SZ DJI Technology Co., Ltd. Method and device for image motion compensation
US11949912B2 (en) 2018-04-02 2024-04-02 SZ DJI Technology Co., Ltd. Method and device for video image processing
US11949911B2 (en) 2018-04-02 2024-04-02 SZ DJI Technology Co., Ltd. Method and device for obtaining motion vector of video image
CN117041556A (en) * 2019-02-20 2023-11-10 北京达佳互联信息技术有限公司 Method, computing device, storage medium and program product for video encoding

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